CN106760175A - A kind of precast wall panel of steel grating aluminium film coating phase-change materials and preparation method thereof - Google Patents

Abstract

A prefabricated exterior wall panel with phase change materials wrapped in steel grid aluminum film and its manufacturing method, comprising inner leaf boards, outer leaf boards and a phase change composite thermal insulation layer, the phase change composite thermal insulation layer includes a core board and thermal insulation metal foil and the supporting connection box; the core plate is made of phase change material, and the supporting connection box includes a steel grid skeleton and a concrete intercepting net, and the gap between the supporting connection box and the core plate forms a cavity together. The outer wall of the steel grid skeleton is connected with a plug-in rod, and the outer leaf plate and the inner leaf plate are respectively connected to the supporting connection box through the plug-in rod. end and groove end. The invention has the advantages of good connection performance, energy storage, and reduced indoor and outdoor temperature difference, and realizes the goal of combining building energy saving with prefabricated buildings.

Description

A prefabricated exterior wall panel with steel grid aluminum film wrapped phase change material and its manufacturing method

technical field

The invention belongs to the field of building components, and in particular relates to a prefabricated sandwich exterior wall panel with a steel grid grid aluminum film wrapped in a phase change material and a manufacturing method thereof.

Background technique

As a big construction country, our country's annual new building area ranks among the top in the world, which means that there will inevitably be a lot of energy consumption in the construction process, and at the same time, the construction form of buildings has become a problem that our country pays more attention to now. Therefore, the effective combination of building energy saving and assembly has become a hot research topic in today's construction industry.

In recent years, prefabricated buildings have gradually entered the right track, and prefabricated shear wall structures have become an upsurge in assembling integral concrete structures. How to effectively combine energy saving and prefabricated buildings in today's form has become a necessary content of research . Years of research and practice have proved that the heat energy loss of the building's outer envelope accounts for more than 40% of the overall building. Therefore, it is particularly important to reduce the heat loss of the building envelope.

The traditional thermal insulation forms of the external enclosure mainly include external thermal insulation, internal thermal insulation and sandwich thermal insulation boards. In prefabricated buildings, due to the external thermal insulation method, it is necessary to paste the thermal insulation layer after the factory wall panels are manufactured or paste them on the construction site. The insulation layer adds a process and prolongs the construction period. In addition, the outer insulation layer is prone to fall off in practical applications; while the inner insulation is easily damaged during decoration and use. Therefore, composite wall panels are commonly used at home and abroad. Prefabricated sandwich thermal insulation wall panels can achieve the advantages of heat preservation and structure with the same service life because they arrange thermal insulation materials in the middle layer of the wall and maintain them with outer and inner blades. And the interference of external factors is reduced, so the scope of its application is more and more extensive.

Although the prefabricated sandwich insulation board has the above advantages, there are also corresponding problems: 1. The reliability of the connection between the inner leaf board, the insulation layer and the outer leaf board is still questionable, and the use of traditional connectors will also cause cold and hot Bridge phenomenon, increasing costs; 2. The thermal conductivity of thermal insulation materials is low, and there is no function of temperature adjustment and energy storage, resulting in large indoor and outdoor temperature differences, loss of energy consumption, and reduced indoor comfort.

Contents of the invention

The purpose of the present invention is to provide a prefabricated exterior wall panel with phase change materials wrapped in steel grid and aluminum film and its manufacturing method, to solve the problems of the existing sandwich insulation wall panels, the connection reliability is still questionable, and there are cold and hot bridges In order to solve the technical problem of the phenomenon, it is also necessary to solve the technical problems of the low thermal conductivity of the thermal insulation material and the lack of temperature adjustment and energy storage functions, resulting in a large indoor and outdoor temperature difference, loss of energy consumption, and reduced indoor human comfort.

To achieve the above object, the present invention adopts the following technical solutions:

A prefabricated exterior wall panel with phase-change materials wrapped in steel grid aluminum film, including reinforced concrete inner blades of the same size, reinforced concrete outer blades and a phase-change composite insulation layer sandwiched between them. The phase-change composite thermal insulation layer includes a core board, an insulating metal foil wrapped on the surface of the core board, and a supporting connection box for holding the core board;

The core plate is integrally made of composite phase-change materials, including a central axis plate and finned plates symmetrically distributed on both sides of the central axis plate, and the supporting connection box includes a steel grid skeleton and is respectively paved and fixed on steel grids. Two pieces of concrete intercepting nets on the front and rear sides of the grid skeleton, the size of the support connection box is compatible with the core plate, and at the same time, the gap between the support connection box and the fin plate forms a cavity together;

The front and rear sides of the outer wall of the steel grid frame are evenly distributed and fixedly connected with inserting rods extending vertically relative to the grid frame, and the outer blades and inner blades are respectively fixed to the front and rear sides of the supporting connection box through the insertion rods connected to form prefabricated exterior wall panels;

The outer blades and inner blades are aligned front and rear, and the supporting connection box is misaligned toward one side of the width direction relative to the outer blades and inner blades, so that the two ends of the prefabricated outer wall panels in the width direction correspond to each other. Form long male and female ends.

The steel grid skeleton includes two grid mesh pieces arranged in parallel and corner post connecting rods connecting the four corners of the two grid mesh pieces, and the grid connecting mesh pieces are welded by horizontal and vertical cross steel bars.

The corner post connecting rods include two protruding end rods and two groove end rods on the same side in the width direction, the protruding end rods are located at the end of the protruding end and flush with the outer wall of the steel grid skeleton, The groove end rods are located at the ends of the groove ends and extend vertically relative to the steel grid skeleton.

The inserting rods are all fixedly connected at the horizontal and vertical intersection positions of the steel bars.

The inserting rod includes an outer leaf inserting rod and an inner leaf inserting rod, the outer leaf inserting rod is inserted into the outer leaf plate with an insertion depth of 50mm-80mm, and the inner leaf inserting rod is inserted into the inner leaf plate , The insertion depth is 20mm-30mm.

The concrete intercepting net is made of cold-drawn steel wire.

The composite phase change material is a gypsum-based paraffin phase-change material, a polystyrene board-based phase-change material or an expanded perlite-based phase-change material.

This connection structure of prefabricated exterior wall panels with phase change material wrapped in steel grid aluminum film includes two left and right spliced prefabricated exterior wall panels, the splicing is mortise and tenon joint, and the protruding end of a prefabricated exterior wall panel is inserted into the In the groove end of another prefabricated exterior wall panel, make the protruding head end rod fit with the groove end rod.

The manufacturing method of this kind of prefabricated exterior wall panels with phase change materials wrapped in steel grid and aluminum film adopts the flat die method, and the manufacturing steps are as follows:

Step 1, making the core board according to the design size of the prefabricated exterior wall board;

Step 2, wrapping the outer side of the core board with thermal insulation metal foil;

Step 3, making a support connection box according to the design size of the prefabricated exterior wall panels, and putting the core board into the support connection box when making the support connection box;

Step 4, install the mold of the prefabricated wallboard, and apply a release agent after cleaning the mold;

Step 5, laying the plate body reinforcement of the inner leaf plate on the bottom of the mold, then pouring the inner leaf plate concrete to form the inner leaf plate, and vibrating to form the inner leaf plate after pouring is completed;

Step 6, place the supporting connection box with the core plate and the heat-insulating metal foil on the concrete of the inner blade plate, and at the same time insert the plug-in rod into the designated position of the concrete;

Step 7, laying the steel bars of the outer leaf plate on the top of the supporting connection box, and then pouring the concrete of the outer leaf plate, so that the inserting rod is inserted into the designated position of the concrete, and vibrating to form the outer leaf plate after pouring is completed;

Step 8, after 24 hours of natural curing, when the concrete reaches the strength requirement, demoulding is carried out.

Compared with the prior art, the present invention has the following characteristics and beneficial effects:

The invention provides a prefabricated sandwich exterior wall insulation board with good connection performance, energy storage and reduced indoor and outdoor temperature difference, and realizes the goal of combining building energy saving with prefabricated buildings.

The sandwich thermal insulation material of the present invention is loaded into a steel wire cage with vertical steel bars, and while the steel wire cage protects the sandwich thermal insulation material, it also uses the vertical steel bars on both sides to go deep into the outer and inner blades when pouring, forming a firm structure. The unique connection form improves the overall connectivity of the sandwich inner and outer wall panels, abandons the traditional tie connection, avoids the phenomenon of cold and heat bridges, and greatly reduces the cost, which is easy to promote. In addition, the sandwich insulation material of the present invention uses phase-change composite insulation materials, and its shape is shaped like fins and wrapped with aluminum film at the same time. A cavity is formed between the steel wire cage and the sandwich insulation material, which not only improves the insulation of the wall The heat insulation effect enhances the thermal conductivity of the wall, reduces energy consumption and saves energy, and can also adjust the temperature difference between indoor and outdoor, improving the comfort of the indoor environment.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of the overall structure of the prefabricated panel of the present invention.

FIG. 2 is a schematic diagram of the transverse cross-sectional structure of FIG. 1 .

FIG. 3 is a schematic view of the longitudinal cross-sectional structure of FIG. 1 .

Fig. 4 is a three-dimensional structural schematic view of the supporting connection box with a plug-in rod of the present invention.

FIG. 5 is a partially enlarged view of FIG. 4 .

Reference signs: 1-outer leaf plate, 2-inner leaf plate, 3-core plate, 3.1-axis plate, 3.2-fin plate, 4-insulation metal foil, 5-support connection box, 5.1-steel grid Skeleton, 5.11-grid mesh, 5.12-corner post connecting rod, 5.121-convex end rod, 5.122-groove end rod, 5.2-concrete intercepting net, 6-inserting rod, 6.1-outer leaf inserting rod, 6.2 -Inner leaf insertion rod, 7-cavity, 8-protruding head end, 9-groove end.

detailed description

The embodiment is shown in Figures 1-5, a prefabricated exterior wall panel with phase change materials wrapped in steel grid and aluminum film, including a reinforced concrete outer leaf plate 1 of the same size, a reinforced concrete inner leaf plate 2 and sandwiched between A phase change composite insulation layer between the two. The outer leaf plate is used as the protective layer of the phase change composite insulation layer, and the thickness is usually 50mm-60mm; the inner leaf plate is used as the load-bearing part of the shear wall, and the steel bars are configured according to the design, and the thickness is usually 100mm-120mm; the usual thickness of the phase change composite insulation layer 40mm-70mm.

The phase-change composite thermal insulation layer includes a core board 3 , an insulation metal foil 4 wrapped on the surface of the core board, and a supporting connection box 5 for supporting the core board.

The core board is integrally made of composite phase-change materials, generally gypsum-based paraffin phase-change materials, expanded perlite-based phase-change materials or EPS insulation boards as base material phase-change materials. The core plate includes a central axis plate 3.1 and finned plates 3.2 symmetrically distributed on both sides of the central axis plate. The fin shape can better realize the thermal insulation and energy storage effect of the phase change material. The supporting connection box includes a steel grid frame 5.1 and two pieces of concrete intercepting nets 5.2 that are respectively paved and fixed on the front and rear sides of the steel grid frame to prevent concrete from being poured into the phase-change composite insulation layer during the production process and blocked A cavity within a wall panel. The support connection box 5 is adapted to the size of the core plate 3, and the gap between the support connection box 5 and the fin plate 3.2 forms a cavity 7 together.

The steel grid skeleton 5.1 in this embodiment includes two grid mesh pieces 5.11 arranged in parallel and corner post connecting rods 5.12 connecting the four corners of the two grid mesh pieces. Welded vertically crossed steel bars. The front and rear sides of the outer wall of the steel grid frame 5.1 are evenly distributed and fixedly connected with plug-in rods 6 that extend vertically relative to the grid frame. The layout spacing is 400mm×200mm, and steel bars with a diameter of 6mm are used.

The outer blades 1 and the inner blades 2 are respectively fixedly connected to the front and rear sides of the supporting connection box through plug-in rods 6 to form prefabricated outer wall panels. The insertion rod 6 includes an outer leaf insertion rod 6.1 and an inner leaf insertion rod 6.2. The outer leaf insertion rod 6.1 is inserted into the outer leaf plate 1 with an insertion depth of 50mm-80mm. The inner leaf insertion rod 6.2 Insert into the inner leaf plate 2, the insertion depth is 20mm-30mm.

The outer blades 1 and the inner blades 2 are aligned front and rear, and the supporting connection box 5 is displaced toward one side in the width direction relative to the outer blades 1 and the inner blades 2, so that the two sides of the prefabricated outer wall panels in the width direction The ends are correspondingly formed with a long convex head end 8 and a groove end 9 respectively.

The corner post connecting rod 5.12 includes two protruding end rods 5.121 and two groove end rods 5.122 located on the same side in the width direction. The outer wall is flush, and the groove end rod 5.122 is located at the end of the groove and protrudes vertically relative to the steel grid skeleton. The protruding height of the protruding head end rod 5.121 relative to the supporting connection box can be equal to the protruding height of the relative supporting connection box with the insertion rod 6 .

The concrete intercepting net 5.2 is made of cold-drawn steel wire.

The thermal insulation metal foil 4 is aluminum foil or other metal foils, and in this embodiment it is aluminum foil.

All fixed connections in the present invention are welding.

This connection structure of prefabricated exterior wall panels with phase change material wrapped in steel grid aluminum film includes two left and right spliced prefabricated exterior wall panels, the splicing is mortise and tenon joint, and the protruding end of a prefabricated exterior wall panel is inserted into the In the groove end of another prefabricated exterior wall panel, make the protruding head end rod fit with the groove end rod.

The manufacturing method of this kind of prefabricated exterior wall panels with phase change materials wrapped in steel grid and aluminum film adopts the flat die method, and the manufacturing steps are as follows:

Step 1, making the core panel 3 according to the design size of the prefabricated exterior wall panels;

Step 2, wrapping the heat-insulating metal foil 4 on the outer side of the core board 3;

Step 3, making the support connection box 5 according to the design size of the prefabricated exterior wall panels, and putting the core board 3 into the support connection box 5 when making the support connection box 5;

Step 4, install the mold of the prefabricated wallboard, and apply a release agent after cleaning the mold;

Step 5, laying the steel bars of the inner leaf plate on the bottom of the mold, then pouring the inner leaf plate concrete to form the inner leaf plate, and vibrating to form the inner leaf plate 2 after pouring is completed;

Step 6, place the supporting connection box 5 with the core plate 3 and the heat-insulating metal foil 4 on the concrete of the inner blade plate, and at the same time insert the connecting rod 6 into the designated position of the concrete;

Step 7, laying the plate body reinforcement of the outer leaf plate above the supporting connection box 5, then pouring the outer leaf plate concrete, inserting the plug rod into the designated position of the concrete, and vibrating to form the outer leaf plate 1 after pouring is completed;

Step 8, after 24 hours of natural curing, when the concrete reaches the strength requirement, demoulding is carried out.

Claims (8)

1. A prefabricated exterior wall panel with phase change materials wrapped in steel grid and aluminum film, including a reinforced concrete outer leaf plate (1) of the same size, a reinforced concrete inner leaf plate (2) and a sandwich between the two The phase-change composite thermal insulation layer is characterized in that: the phase-change composite thermal insulation layer includes a core board (3), an insulation metal foil (4) wrapped on the surface of the core board, and a supporting connection box (5) for supporting the core board ; The core plate is integrally made of composite phase-change materials, including a central axis plate (3.1) and finned plates (3.2) symmetrically distributed on both sides of the central axis plate, and the supporting connection box includes a steel grid skeleton ( 5.1) and two pieces of concrete intercepting nets (5.2) that are respectively fixed on the front and rear sides of the steel grid skeleton. ) and the gap between the fin plate (3.2) together form a cavity (7); The front and rear sides of the outer wall of the steel grid frame (5.1) are evenly distributed and fixedly connected with plug-in rods (6) that extend vertically relative to the grid frame, and the outer blades (1) and inner blades (2) respectively pass through The insertion rod (6) is fixedly connected to the front and rear sides of the supporting connection box to form a prefabricated outer wall panel; The outer blades (1) and inner blades (2) are aligned front and rear, and the supporting connection box (5) is misaligned toward one side of the width direction relative to the outer blades (1) and inner blades (2), so that The two ends in the width direction of the prefabricated exterior wall panels correspond to form a long protruding end (8) and a groove end (9). 2. The prefabricated exterior wall panel with steel grid aluminum film wrapped phase change material according to claim 1, characterized in that: the steel grid skeleton (5.1) includes two grid mesh pieces (5.11) arranged in parallel And the corner post connecting rods (5.12) connecting the four corners of the two grid mesh pieces, the grid connecting mesh pieces (5.11) are welded by horizontal and vertical cross steel bars. 3. The prefabricated exterior wall panel with steel grid aluminum film wrapped phase change material according to claim 2, characterized in that: the corner post connecting rod (5.12) includes two protruding end rods located on the same side in the width direction (5.121) and two grooved end rods (5.122), the convex end rods (5.121) are located at the end of the convex end, flush with the outer wall of the steel grid skeleton, and the grooved end rods (5.122) are located The end of the groove end is vertically outstretched relative to the steel grid skeleton. 4. The prefabricated exterior wall panel with phase change material wrapped in steel grid and aluminum film according to claim 2, characterized in that: the inserting rods are all fixedly connected at the horizontal and vertical intersections of steel bars. 5. The prefabricated exterior wall panel with steel grid aluminum film wrapped phase change material according to claim 1 or 4, characterized in that: the insertion rod (6) includes an outer leaf insertion rod (6.1) and an inner leaf The insertion rod (6.2), the outer leaf insertion rod (6.1) is inserted into the outer leaf plate (1), the insertion depth is 50mm-80mm, and the inner leaf insertion rod (6.2) is inserted into the inner leaf plate (2) Inside, the insertion depth is 20mm-30mm. 6. The prefabricated exterior wall panel with steel grid aluminum film wrapped phase change material according to claim 1, characterized in that: the concrete intercepting net (5.2) is made of cold drawn steel wire. 7. The prefabricated exterior wall panel with steel grid aluminum film wrapped phase-change material according to claim 1, characterized in that: the composite phase-change material is a gypsum-based paraffin phase-change material or an expanded perlite-based phase-change material. 8. According to any one of claims 1-7, the manufacturing method of the prefabricated exterior wall panel with phase change material wrapped in steel grid and aluminum film adopts a flat mold method, and it is characterized in that the manufacturing steps are as follows: Step 1, making the core board (3) according to the design size of the prefabricated exterior wall board; Step 2, wrapping the heat-insulating metal foil (4) on the outer side of the core board (3); Step 3, make the support connection box (5) according to the design size of the prefabricated exterior wall panel, and put the core board (3) into the support connection box (5) when making the support connection box (5); Step 4, install the mold of the prefabricated wallboard, and apply a release agent after cleaning the mold; Step 5, laying the steel bars of the inner leaf plate on the bottom of the mold, then pouring the inner leaf plate concrete to form the inner leaf plate, and vibrating to form the inner leaf plate after pouring is completed (2); Step 6, place the supporting connection box (5) with the core plate (3) and the heat-insulating metal foil (4) on the concrete of the inner leaf plate, and at the same time insert the insertion rod (6) into the designated position of the concrete; Step 7: Lay the steel bars of the outer leaf plate on the top of the supporting connection box (5), then pour the outer leaf plate concrete, insert the plug rod into the designated position of the concrete, and vibrate and form the outer leaf plate after pouring is completed ( 1); Step 8, after 24 hours of natural curing, when the concrete reaches the strength requirement, demoulding is carried out.